[old_master]

Front suspension parts have a range of motion that they were designed to operate within. Front chassis ride height puts the suspension at the proper height so all of those parts are within their range. If ride height is correct, and the body is not level, don't try to correct it by adjusting the torsion bars, look for a problem where the body mounts to the chassis.

Front chassis ride height directly affects wheel alignment. Therefore it must be checked and adjusted if necessary BEFORE every alignment. The slightest adjustment to a torsion bar will change alignment angles drastically. Front ride height on GM T body vehicles is the vertical distance between the lower-most inboard point of the steering knuckle, nearest the ball joint, to the center of the lower control arm pivot bolt. It must be checked/adjusted when the vehicle is perfectly level, front to rear and side to side, (alignment rack). After it is adjusted, the front end should be aligned. A good alignment shop will check and adjust it if necessary with the alignment, afterall, it's part of the alignment. Specs: All except Z85 & ZR2: 4.6 to 5.0 inches with 4.8 being desired. Z85 & ZR2 is 4.6 to 5.2 inches with 4.9 being desired. If you can not achieve proper spec, the torsion bar is weak and needs to be replaced.